Drawing frame for spinning machines



April 20, 1954 K. s. HOHLOCH DRAWING FRAME FOR SPINNING MACHINES Filed April 24, 1950 2 Sheets-Sheet l INVEPIT R I KURT SIEGFRIED Hull-06H April 20, 1954 s HQHLQCH 2,675,586

DRAWING FRAME FOR SPINNING MACHINES Filed April 24, 1950 2 Sheets-Sheet 2 29 IHVEHTOR:

KuR-r SIEeFRIEv HOHLOH BY: Moi/2% Patented Apr. 20, 1954 DRAWING FOR SPINNING MACHIN Kurt Siegfried 'Holilo'ch, Eber 'sba cli (Fflsi), Gefmany, assigiic of one-half to SiiddntSche Spindelwe'r'ke Ziifsr, Ebersbach (Fils), Wurtwinte 's, German a joint-stock com any of lagerfabriken Aktiengesellschaft,

Stuttgart Bad Gann's'tatt; Wurttemb'erg, Germany, a joint-stock company of Germany Application April 24, 1950, Serial No. 157,731

Claims priority, application Germany May 28, 1949 '7' claims.

Thisinvention relates to textile machinery and more especially to the drawing frames forming part of spinnin and other textile machines.

It is more especially concerned with the type of drawing frame carrying pivot-less drawing rollers and with an iihprclvementof the weighting device for the top rollers of the drawing set.

Drawing frames are known, in which the weighting of the top rollers is effected by means of a spring acting on a pluralityof top rollers, the weighting action of the spring being transmitted ontothe individual rollers by means of asaddle. Combinations of this kind have been used in drawing frames provided with pivots for the top rollers and also for pivotless rollers, but they involve the drawback that whenever the drawing set is being adjusted, the ratio of mutual weighting of the individual rollers undergoes a change which has an unfavorable influence on the spinning operation. Therefore,- as a rule, a second saddlemust be resorted to, if adjustment within wide limits is required.

In the drawing frames according tothe pres: ent invention each top roller of the drawing set has its own weighting spring which is so arranged that the degree of loading exerted by it on its roller does not undergo a change when the drawing set is adjusted. Obviously this enables a distribution of the load over the individualrollers to be dispensed with. a

The arrangement according to this inventionbeoomes particularly simple if the holders of the individual pivotless top rollers are resiliently yielding members. In this case the associated; yielding holders of a drawing set can be guidedand supported in a rail; preferably of U section, extendin above the top rollers in parallel to the drawing set their weighting effectonthe individual rollers always remaining the same reardle'ss of the adjustment ofthe set. I

This arrangement is further im-prdved by fixing onthe rail together with the yielding top roller holder also a holder for the clearer roller insuch a manner that this latter holder can be shifted together with the yielding top roller holder. In this combination the clearer roller always automatically assumes the correct position relative to the top roller, I prefer to so fashion the holder for the clearer roller that it embraces the channel-shaped rail, guiding the loading spring at its bottom part and keeping it under prelim-- inary tension when the drawingframe is relieved of ,th W1- The guide rail for the resilient top roller holders is preferably supported at its upper end for rocking motion relative to the holder bar and its front end is positivelyconnected with thereversing rail. Since in this case the reversing rail is relied upon to support part of the top roller weight, I prefer reinforcing it and bolting it to the roller stand. H

Owing to this arrangement of the weighting device any detached hooks or combed slivers can be dispensed with altogether and the calendar rollers, on which laps might form, can be mounted in place and removed without requiring the load on-the drawing frame to be relieved. The member connecting the reversing" rail with the channel rail will secure this latter against; any sidew'is'e displacement whereby an accurate parallel guiding of the top' and bottom. rollers is obtained. 7

In the drawings afiixed to this specification and forming part thereof an embodiment of this invention is illustrated diagrammatically byway of example.

In the drawings 0 Y Fig. 1 is a diagram showing; artly in vertical section, adrawing frame according to this invention, the parts being in operating position.

Fig. 2 is a similar view of the frame, however, with the top rollers in raised position.-

Fig. 3' is a' partial plan view, drawn to a smaller scale, and,

Figs. 4 t'o 6 are sectional detail views. A

Referring to the drawings and first to Figs. 1-3, I is the U-shaped guide rail or channel and 2, 3 and" 4' are the resilient holders, guided in this ch'annel, of the tap mu'eis 5,5 and 1, respectively, their top end's' being fixedto the rails by means of screw bolts 8, 9 and It, respectively, which also connect to the rail the holders II, I 2 and [3 for the clearer rollers (Fig. 4). Near the free ends of the resilient holders 2;. 3 and l are fixed yqy means or'rivets gripping springs (4-, 1's

an I6, respectively; oif s"imilar me'ans for suppgiifting'the top rollers 5, 6 and 1 ina resilient or yielding manner. The rail- I is supported by its top end for rocking movement on the holder bar l1. N ear' its free endit can be positively conheated by of the hOok shaped members I Q and 2ll- (Figs. '2 and 5 Al with the-reversing rail [8 to the roller stands. I u

Fig.3 shows a longitudinal slot- 24 formed in the niddle web of the rail I which serves for adjusting the set-a graduation 25 (Fig. 3) being provided near this slot. u

Fig-.- @A shows on alarger scale the middle top roller 6 with-its resilient holder ii andthe gripping spring l5. The screw bolt 9 fixesthe holder 3 together with the holder I2 of the clearer roller 2| to the rail I, the holder I2 keeping the holder 3 under preliminary tension. This figure also shows that the clearer roller 2| is always maintained in the same position relative to the top roller 6 it is associated with. r

Fig. 4B shows the clearer ro1ler holder I2 a embracing the rail I and guiding the resilient holder 3 at its free end.

Figs. 5A and 5B illustrate the connection between the reversing rail I8 and the channel rail I, a member I9 embracing the reversing rail and being formed as a hook at its top end. This hook-shaped portion is formed with an open notch 30 in which rests the channel rail I. On the rail I there is mounted for rocking movement at 3| another hook-shaped part 20 which together with the part I9 enables a readily disengageable connection to be established between the top roller holder I on the one hand and the reversing rail I8 and the roller stand I8 on the other hand. If this connection is so organized, for instance by means of a spring (not shown) acting on the part 20, as to be established automatically as soon as the members I9 and 20 contact each other, all that is needed for weighting the drawing frame is to move the rail I downwardly until the hook 20 has gripped the hook I9. In order to disengage again the parts, a slight pressure exerted on the top end 32 of the double armed lever 20 and on the bottom of rail I will be sufiicient to release the latter.

Fig. 6 illustrates the way in which two ends of the reversing rail I8 are connected to the roller stand 23 by means of screw bolts 22.

I wish it to be understood that I do not desire to be limited to the details shown and described for obvious modifications will occur to a person skilled in the art.

I claim:

l. A pivotless drawing frame for textile machines comprising in combination, a set'of top rollers, a separate loading spring holder for each top roller, a channel-shaped rail extending above said rollers and forming a guide for said holders and a clearer roller holder adjustably fixed to said rail and, associated with and maintaining each loading spring holder under preliminary tension.

2. A pivotless. drawing frame for textile 'machines comprising in combination, a set of top rollers, a separate loading spring holder for each top roller, a channel-shaped rail extending above said rollers and forming a guide for said holders, a reversing rail and a readily disengageable connecting device positively coupling said two rails.

3. A pivotless drawing frame for textile machines comprising in combination, a set of top rollers, a separate loading spring holder for each top roller, a channel-shaped rail extending above said rollers and forming a guide for said holders, a reversing rail and a pair of hook-shaped connecting members, one on each rail, resiliently coupling said two rails.

4. A pivotless drawing frame for textile machines comprising in combination, a set of top rollers, a separate loading spring holder for each top roller, a channel-shaped rail extending above said rollers and forming a guide for said holders, a reversing rail and a pair of hook-shaped connecting members, one on each rail, resiliently coupling said two rails, a notch in the hookshaped connecting member of said reversing rail forming a seat for said channel-shaped rail.

' ,5. Apparatus for guiding and pressing top rolls of textile drawing machines; comprising, in combination, an elongated support extending over the drawing plane and having an underside directed toward the drawing plane; a plurality of spring vmeans distributed along the length of said support and having upper end portions respectively fixed tothe underside of said support, said plurality of spring means extending downwardly from said support toward the drawing plane and being carried only by said support at 7 said underside thereof, said spring means respectively having lower free end portions distant from said support; a plurality of sets of top rolls each of which includes a shaft connected to the rolls, saidsets of top rolls being respectively located adjacent to said plurality of spring means and beneath said support; and a plurality of attaching means respectively engaging said shafts of said sets of top rolls on opposite sides thereof to turnably maintain said shafts in a predetermined position, said pluralityof attaching means respectively attaching said shafts only to said lower free ends of said plurality of spring means and respectively forming units with the latter to transfer to said sets of top rolls, respectively, forces exerted by said spring means in a direction downwardly from said support, said spring means and attaching means being entirely free except for engagement of said spring means with said support and said attaching means with said shafts of said sets of top rolls.

6. Apparatus for guiding and pressing top rolls of textile drawing machines, comprising, in combination, an elongated support extending over the drawing plane and having an underside directed toward the drawing plane; a plurality of spring means distributed along the length of said support and having upper end portions respec tively fixed to the underside of said support, said plurality of spring means extending downwardly from said support toward the drawing plane and being carried only by said support at said underside thereof, said spring means respectively having lower free end portions distant from said support; a plurality of sets of top rolls each of which includes a shaft connected to the rolls,,said sets of top rolls being respectively located adjacent to said plurality of spring means and beneath said support; a plurality of attaching means respectively engaging said shafts of said setsof top rolls on opposite sides thereof to turnably maintain said shafts in a predetermined posi-, tion, said plurality of attaching means respec tively attaching said shafts only to said lower free ends of said plurality of spring means and respectively forming units with the latter to transfer to said sets of top rolls, respectively, forces exerted by said spring means in a direction downwardly from said support, said spring means and attaching means being entirely free except for engagement of said spring means with said support and-said attachingmeans with said shafts of said sets of top rolls; releasable hold-j ing means connectedto said support for releasably holding the same in an operative position on the apparatus and for preventing upward movement of said support during operation of the apparatus; and means for adjusting the location of said upper end portions of said spring means along the length of said support. I

7. Apparatus for guiding and pressing top rolls of textile drawing machines, comprising, in com bination, an elongated support extending over the drawing plane and having an underside directed toward the drawing plane; a plurality of substantially V-shaped leaf springs distributed along the length of said support and each having opposite free end portions one of which is connected to the underside of said support, said leaf springs extending downwardly from said support toward the drawing plane and being carried only by said support at said underside thereof, the other of said free end portions of each leaf spring being located distant from said support; a plurality of sets of top rolls each of which includes a shaft connected to the rolls, said sets of top rolls being respectively located adjacent said other end portions of said leaf springs, respectively; a plurality of attaching means respectively engaging said shafts of said sets of top rolls on opposite sides thereof to turnably maintain said shafts in a predetermined position, said plurality of attaching means respectively attaching said shafts only to said other free end portions of said leaf springs and respectively forming units with the latter to transfer to said sets of top rolls, respectively, forces exerted by said leaf springs in a direction downwardly from said support, said leaf springs and attaching means being entirely free except for the engagement of said springs with said support and said attaching means with said shafts of said sets of top rolls; and releasable holding means connected to said support for releasably holding the same in an operative position on the apparatus and for preventing upward movement of said support during operation of the apparatus.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,469,548 Tschudy Oct. 2, 1923 2,100,139 Honda Nov. 23, 1937 2,143,996 Orrell Jan. 17, 1939 2,160,545 Honda May 30, 1939 2,246,474 Stahlecker June 1'7, 1941 2,306,849 Toenniessen Dec. 29, 1942 2,353,338 Hess July 11, 1944 2,404,218 Crossley July 16, 1946 

